10099181 has 4 divisors (see below), whose sum is σ = 10117500. Its totient is φ = 10080864.

The previous prime is 10099171. The next prime is 10099217. The reversal of 10099181 is 18199001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18199001 = 1303 ⋅13967.

It can be written as a sum of positive squares in 2 ways, for example, as 1069156 + 9030025 = 1034^2 + 3005^2 .

It is a cyclic number.

It is not a de Polignac number, because 10099181 - 2¹⁴ = 10082797 is a prime.

It is a super-2 number, since 2×10099181² = 203986913741522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10099151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8306 + ... + 9443.

It is an arithmetic number, because the mean of its divisors is an integer number (2529375).

Almost surely, 2^10099181 is an apocalyptic number.

It is an amenable number.

10099181 is a deficient number, since it is larger than the sum of its proper divisors (18319).

10099181 is an equidigital number, since it uses as much as digits as its factorization.

10099181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18318.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 10099181 is about 3177.9208611921. The cubic root of 10099181 is about 216.1533904167.

It can be divided in two parts, 1009 and 9181, that multiplied together give a palindrome (9263629).

The spelling of 10099181 in words is "ten million, ninety-nine thousand, one hundred eighty-one".